IP68 waterproof: can extend the service life Long-distance signal transmission can be heard even in the bedroom The volume is loud, which solves the problem of inaudibility for the elderly. You can also set one-click mute and , which is convenient for the elderly. The volume can be adjusted as you like. Plug Type:EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so on Voltage: AC100-240V Material: plastic colour: Black Package Contents: 1 x receiver 1 x transmitter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.